Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A2B2O7 type rare earth tantalate ceramic and preparation method thereof
The invention relates to the technical field of thermal barrier coatings, and particularly discloses an A2B2O7 type rare earth tantalate ceramic and a preparation method thereof. The preparation method comprises the following steps: respectively dissolving RE2O3 and M2O3 into concentrated nitric acid according to the structural formula of RE2MTaO7 to react and adjusting the pH value to be not lessthan 1.5, dropwise adding a TaOCl3 solution, continuously stirring, adding ammonia water to stabilize the pH value of the system at 9-10, continuously stirring in a water bath environment, washing the precipitate with deionized water until the pH value is 7, drying the obtained filter cake in a drying oven, and screening for later use; and placing the powder in a graphite grinding tool, performing spark plasma sintering in a sintering furnace, then performing annealing and carbon removal on a sintered sample to obtain a compact RE2MTaO7 block. The material has the characteristics of low heatconductivity, high hardness, fracture toughness and the like.
本发明涉及热障涂层技术领域，具体公开了一种A2B2O7型稀土钽酸盐陶瓷及其制备方法，按照RE2MTaO7的结构式将RE2O3和M2O3分别溶入浓硝酸中进行反应，并将PH调至不低于1.5，然后将TaOCl3溶液逐滴加入，不停的搅拌，同时加入氨水使体系PH稳定在9～10，在水浴环境内继续搅拌，然后用去离子水洗涤沉淀，直至PH＝7，将得到的滤饼置于烘箱内烘干，然后过筛备用；将粉末置于石墨磨具内，在烧结炉内进行放电等离子烧结，然后将烧结好的样品进行退火除碳，得到致密的RE2MTaO7块体，这种材料具有低的热导率、高硬度和断裂韧性等特性。
A2B2O7 type rare earth tantalate ceramic and preparation method thereof
The invention relates to the technical field of thermal barrier coatings, and particularly discloses an A2B2O7 type rare earth tantalate ceramic and a preparation method thereof. The preparation method comprises the following steps: respectively dissolving RE2O3 and M2O3 into concentrated nitric acid according to the structural formula of RE2MTaO7 to react and adjusting the pH value to be not lessthan 1.5, dropwise adding a TaOCl3 solution, continuously stirring, adding ammonia water to stabilize the pH value of the system at 9-10, continuously stirring in a water bath environment, washing the precipitate with deionized water until the pH value is 7, drying the obtained filter cake in a drying oven, and screening for later use; and placing the powder in a graphite grinding tool, performing spark plasma sintering in a sintering furnace, then performing annealing and carbon removal on a sintered sample to obtain a compact RE2MTaO7 block. The material has the characteristics of low heatconductivity, high hardness, fracture toughness and the like.
本发明涉及热障涂层技术领域，具体公开了一种A2B2O7型稀土钽酸盐陶瓷及其制备方法，按照RE2MTaO7的结构式将RE2O3和M2O3分别溶入浓硝酸中进行反应，并将PH调至不低于1.5，然后将TaOCl3溶液逐滴加入，不停的搅拌，同时加入氨水使体系PH稳定在9～10，在水浴环境内继续搅拌，然后用去离子水洗涤沉淀，直至PH＝7，将得到的滤饼置于烘箱内烘干，然后过筛备用；将粉末置于石墨磨具内，在烧结炉内进行放电等离子烧结，然后将烧结好的样品进行退火除碳，得到致密的RE2MTaO7块体，这种材料具有低的热导率、高硬度和断裂韧性等特性。
A2B2O7 type rare earth tantalate ceramic and preparation method thereof
一种A2B2O7型稀土钽酸盐陶瓷及其制备方法
FENG JING (Autor:in) / ZHENG QI (Autor:in) / YANG KAILONG (Autor:in) / WANG JUN (Autor:in) / CHEN LIN (Autor:in) / ZHANG ZHIDONG (Autor:in) / LI ZHENJUN (Autor:in) / WANG FENG (Autor:in)
13.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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